Multiple bending apparatus



ay 7 F. J. L. DINKEL MULTIPLE BENDING Q APPARATUS 2 Sheets-Sheet 1 Filed June 1,

ATTORNEYS I 1,628 581 1927 F. J. L. DINKELY MULTIPLE BENDING APPARATUS Filed Juhe 1. 192a 2 Sheets-Sheet 2 WITNESSES INVENTOR FHF/NK J. LD/N/(EL till Patented May 10, 1927.

UNITED STATES PATENT OFFICE.

FRANK L L. DENKEL, OF NQRTH BERGEN, NEW JERSEY MULTIPLE BENDING APPARATUS.

Application filed June 1,

This invention relates to an a iiparatus for bending: lengths otmaterial, the same being especially designed for the bending; of rein orcing rods used in cement structures.

One of the princi iial objects ol the present invention to provide an a 'iparat'us for facilitating the double bending: of lengths of material and. particularly to provide readily adjustable means for accomj'ilishiug said double bending operation so that variations in the configuration of: the bends to be made may be more readily tlC'OOlHjDllSllttl.

.The invention furthermoreaims to provide an apparatus of the character set forth which is comparatively simple in its construction and mode of operation, which highly efficient in its purpose, and economical to produce.

llVith the above recited and other objects in view, reference is had to the following;- specificaition and accompanying drawings in which there is exhibited one example or embodiment of the invention which is in no way intended as a. limitation upon the scope of the appended claims as it is to be clearly understood that variations and modifica' tions which properly fall within the scope of said claims may be resorted to when found ex edient.

.in the drawings Figure 1 is a plan view of the device illustrating the parts in normal position and prior to the bending of the article to be bent;

Fig. 2 is a similar view illustrating; the position of the parts upon the initial bendinn operation;

Fig. 3is a similar View illustrating the position of the parts upon the second bending operati on; i

Fig. .lis an edge view of the device as illustrated in Fi 3. parts being broken away to disclose t e underlying structure;

Fig. 5 is an enlarged fragmentary transverse sectional view taken approximately on the line 5-5 of Fig; 1;

Fig. 6 is a fragmentary enlarged longitudinal sectional view taken approximately on the line 6-6 of Fig. 1..

Referring to the drawings by cl'iaracters of reference the bending apparatus includes a base 10 having secured thereto a fixed clamping device 11 which ncludes a stationary clamping jaw 12 and an adjustable clamping jaw 13, the latter being advanced 1926. Serial No. 113,057.

tUWttI't'l the i-atatiouary jaw b any suitable means. such as the screws l t- The movable jaw 13 is guided by stud bolts 15 iassii'ip; through slots it; in said jaw, which stud bolts also serve as an ai'l'uiliary retaining means in addition to the screws it. The uon adjustable movable chuu'ninr device designat ed gem-wally by the re'l'erence chur- :u-ter ti. is j-urried by an arm [8 which is pivoted at It) to the fixed claiu iiiur dc ice. The movable clamping}? device ii'lcludes a tilted jaw and an :uljustable jaw ill. the latter being advanced toward the :l'ormer by any suitable means such as screws 2?] and guided and retaiut-zd by stud bolts 2 pass-- inc; throurjh slots 2dr. llhe ap mrat'us further includes an adjustable movable clampingdevice designated sn neral v by the reference character 25. which device comprises a slide 26 longitudinally zuiljustable on the arm 18, with JHQLH'L, for holdim: the slide in its loi'uritudinally adjusted pose tions consisting; ot? a l'i'indiu l Htl'tlt' 27. or other equivalent device. The slide is termed with a stationary jaw 28 and the slide has pivoted theretoi at; 29 a swirunible plate 30 which plate is torn'lcd with a ilfiifitl jaw 31. and an adjustable jaw the adjustable jaw being advanced toward. the lived jaw by any suitable means. such as screws 33, and guided and maintained in its adjusted positions by stud bolts 34- paie no; through slots formed therein The plate is provided with a retaining; screw 35, which may serve to lock the plate against; swin e ing movement relative to the slide tor a purpose to be hereinafter set forth The fixed. jaw ill of the plate is provided with a soc ct fill 't'or detachal'il receiving; an onerab ing lever 37. The arm 18 at its l'rcc end. is supported in its u'iowni'icnti hv an arcuate supporting rail 38 't'ormed with an arcuate ratchet segment; 39 secured to the base it) anddisposed concentric to the pivot 19 ot' the arm. A pawl or doc; all) is pivoted on the free end of the arm at 51-1. it'or swii no; movements into and out of cl'ipjagm cu'ient with the ratchet segment.

In use, the arm 18 is noru'ially swuiu to its initial position illustrated in l igr. i where portions of the clamping dcvhcs ll and 17 engage to limit its swinging 11love meut beyond such pointy thereby disposiur; the inner faces of the fixed, jaws l2 and 2H in aliucuuiiit. L lli the same timci the plate b0 which constitutes a part; of the :i ljustuhlc t ll ll U

ltlii llt) movable clamping device 25, is swung s that'the fixed jaw 31 is in engagement with the stationary jaw (it the slide thereby disposing the inner face of the fixed jaw 31 in alinement with the in uer faces o t the fixed jaws l2 and 20.

Where a similar double bending oil a number of rods is to be accomplisheijl. thc rc taining screw 35 is loosened to allow {or the swinging movement: of the plate Lit) relative to the slide. The slide is initially adjusted on the arm 18 toward or away from the non-adjustable movable clai'nping device 17, by loosening the screw 27 and tightening the same after the adjustment is made. The operator then places the rod indicated by the dotted line at R, between the lined and movable jaws and adjusts the same until a snug clamping fit is provided. In etlfecting the bending operation, the rods are placed between the fixed and adjustable movable clamping jaws 12 and 13. 2t) and 21, and 31 and 32, respectively, with the pawl or dog engaging the 'ittl'CllOt segment. The operator, by means of he lev r 3T, swings the arm to the desired position for making the initial bend indicated at A in Figs. 2 and 3. By swinging the lever 37 in the opposite direction, the plate will be swung. independently of the arm and slide to make the second bend at the point 13 illustrated in Fig. This is accomplished due to the fact that the dog or pawl 49 prevents a reverse swinging movement of the arm 18 and the slide which is attached thereto. After the bending operation. the bent rod is removed and the parts swung to the normal position illustrated in Fig. 1, by disengaging the pawl or dog.

In event it is desired to use the device for a single bending, the plate 30 secured against swinging movement by disposing the same in the normal position illustrated in Fig. 1 and tightening the retaining screw so that independent swinging movement of the plate with respect to the slide and arm 18 isprevented. At the same time, the pawl or dog is swung upwardly to a posi tion out of engagement with the ratchet teeth where it is prevented from gravitationally falling into engagement by the lever 37. Under this arrangement, the rod or work R is placed between the respective jaws of the clamping device as illustrated in F 1 and the desired bend at the point A is made. hen the bent rod or work removed, it is only necessary to swing the lever in a reverse direction. which due to the clamped relation of tl e plate with the slide.

efiects the return movemei'it of the arm 18.

If desired, a suitable abutment may be adjust-ably associated with the rail 38 or the base to gage the swinging movement of the arm 18 where a number of similarly bent rods are to be produced.

it will be noted that as a t'cutnrc in the assembling oi" th device. the pivot lift is rctained in place by the superposition of :1 portion ol' the tixcd jaw i l ol thc clamping." device 17 ovcr the hcad otthc pivot. and for tjl]i:1-ipurpo:-1c the iiscd jaw 151i is rcinov ably associated with t to arm bi arrows or any other suitable l ar-toning dcvi -r.- 'lL. Also the pivot 29 is rctaini'd in place by the .--;upcrpositinn ot c. portion ot the movable jaw 32 ot' the clamping dcvicc i l ovcv the head ol the pivot when thc complctc :i 'iparatns is to be transported. ()rdinurilv the pivots arc gi'avitulionully uminiaincd in place as the base to is arranged in a horiziontal position when in nsc.

What is claimed is:

1. .r bending apparatus. including a i'ixcd worlcclamping device. a swiinzublc non-ad justahle worlc-clampi device pivoted adjacent the fixed worlt-clamping dcvicc. and an ljustablc w irl-t'clan1ping device carried by and swingablc with respect to the swingable non-ad table clamping device.

2. bending apparatus, including a tixed lamping device. a swingable non-adjustablc work-clamping device pivoted adjacent the fixed worleclamping device. an adjustable worloclamping device swingable with respect to the swingable non-adjustable clamping device. and means for preventing retrograde swinging movement of the swingable non-adjustable clamping device when swinging the adjustable swingahlc clami iing device in a reverse direction.

3. A multiple bending apparatus including a base having a fixed work-clamping device thereon. a movable non-adjustable workclamping device mounted adjacent to the tixed worlrchimping device. an adjustable work-clamping device mounted on the nonadjustable wm'k-clamping device for relative movement with respect. thereto and interengagcable means on the movable non-adjustable worleclamping device and the base tor preventing retrograde movement ot the movable non-adjust'ablc device upon movement:- of the adjustable device in a reverse direction.

4'. A multiple bending apparatus incliu'ling a. base having a fixed worloclamping device comprising a pair oi relatively adjustable jaws. a swingable lltlllil(ljll.'\l'lll)lO workclam ping device pivoted adjacent: the lixcd \vorlr-cnunping device comprising a pair of relatively adjustable worloclan'iping jaws, an adjustable worli-clamping device swing- :iblc with respect to the swingablc non-adjustable work-clamping device comprising a pair o't relatively adjust able jaws. and interengageable means on the base and on the swingable non-:nljustable work-clamping device for preventing retrograde swinging movement ot? the swingable noiviuljustahle work-clamping device when swinging the adjustable work-clamping device in a reverse direction.

5. A multiple bending apparatus including a base having a fixed work-clamping device comprising a pair of relatively adjustable jaws, a swingable norradjustable workclamping device pivoted adjacent the fixed work-clamping device com prising a, pair of relatively adjustable worleelamping jaws, an adjustable worlvclamping device swingable with respect to the swingable nomadjustable work-clamping device comprising a pair of relatively adjustable jaws, and interengageable means on the base and on; the swing-able non'adjustable work-clamping device for preventing retrograde swinging movement of the swingable non-adjustable work-clamping device when swinging the adjustable work-clamping device in a reverse direction, said latter means consisting of a fixed arcuate ratchet segment carried by the base and a pawl engageable therewith car ried by the movable-non-adjustable workclamping device.

6. A multiple bending apparatus, comprising a base, a stationary clamping unit on the base, incli'uling fixed and adjustable aws for engaging and holding one end of the Work, a swingable arm pivoted adjacent the stationary unit, a clamping device secured to the pivoted end of the arm, a slide l0ngitudinally adjustable on the arm having a stationary j aw, means for retaining the slide in adjusted relation, a plate pivoted on the arm for swinging movement, a clamping device on the plate including fixed and adjustable jaws, the fixed jaw engaging the stationary jaw of the slide for limiting the swinging movement of said clamping device, means for locking the plate against swinging movement and releasing the same for swinging movement, an arcuate ratchet eoncentric with the arm pivot, a pawl adjacent the free end of the arm engageable with the ratchet, and a lever detachably associated with the plate :tor operating the device, as and in the manner specified.

FRANK J. L. DINKEL. 

